From 526e2ef71c5b797818bbf232e21d0152a3938197 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Tue, 8 Jun 2021 12:45:20 -0400
Subject: VS: Add support for add_custom_command DEPFILE

Transform the depfile into MSBuild `AdditionalInputs` content.  Add
MSBuild Targets to update `AdditionalInputs` and the `.tlog` files for
future builds without actually modifying the `.vcxproj` file.

Fixes: #20286
---
 Templates/MSBuild/CustomBuildDepFile.targets | 48 ++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 Templates/MSBuild/CustomBuildDepFile.targets

(limited to 'Templates')

diff --git a/Templates/MSBuild/CustomBuildDepFile.targets b/Templates/MSBuild/CustomBuildDepFile.targets
new file mode 100644
index 0000000000..2387ab5392
--- /dev/null
+++ b/Templates/MSBuild/CustomBuildDepFile.targets
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <!-- Update AdditionalInputs with depfile-discovered inputs.  -->
+  <Target Name="CMakeCustomBuildDepFileAdditionalInputs" BeforeTargets="CustomBuild" Condition="'@(CustomBuild)' != ''">
+    <ItemGroup>
+      <!-- Save original AdditionalInputs generated by CMake.  -->
+      <CustomBuild>
+        <CMakeAdditionalInputs>%(CustomBuild.AdditionalInputs)</CMakeAdditionalInputs>
+      </CustomBuild>
+      <!-- Read depfile-discovered inputs.  -->
+      <CustomBuild Condition="Exists('%(CustomBuild.DepFileAdditionalInputsFile)')">
+        <DepFileAdditionalInputs>$([System.IO.File]::ReadAllText('%(CustomBuild.DepFileAdditionalInputsFile)').TrimEnd())</DepFileAdditionalInputs>
+      </CustomBuild>
+      <!-- Add depfile-discovered inputs to AdditionalInputs.  -->
+      <CustomBuild Condition="'%(CustomBuild.DepFileAdditionalInputs)' != ''">
+        <AdditionalInputs Condition="'%(CustomBuild.AdditionalInputs)' == ''">%(CustomBuild.DepFileAdditionalInputs)</AdditionalInputs>
+        <AdditionalInputs Condition="'%(CustomBuild.AdditionalInputs)' != ''">%(CustomBuild.AdditionalInputs);%(CustomBuild.DepFileAdditionalInputs)</AdditionalInputs>
+      </CustomBuild>
+    </ItemGroup>
+  </Target>
+
+  <!-- Update the tracking log with depfile-discovered inputs.  -->
+  <Target Name="CMakeCustomBuildDepFileTrackingLog" AfterTargets="CustomBuild" Condition="'@(CustomBuild)' != ''">
+    <!-- Compute the tracking log content for each CustomBuild item individually.  -->
+    <ItemGroup>
+      <!-- Read depfile-discovered inputs.  -->
+      <CustomBuild Condition="Exists('%(CustomBuild.DepFileAdditionalInputsFile)')">
+        <DepFileAdditionalInputs>$([System.IO.File]::ReadAllText('%(CustomBuild.DepFileAdditionalInputsFile)').TrimEnd())</DepFileAdditionalInputs>
+      </CustomBuild>
+      <!-- Generate tracking log representation of all inputs.  -->
+      <CustomBuild>
+        <ReadTLog>^%(CustomBuild.Identity)&#xD;&#xA;</ReadTLog>
+      </CustomBuild>
+      <CustomBuild Condition="'%(CustomBuild.CMakeAdditionalInputs)' != ''">
+        <ReadTLog>%(ReadTLog)$([System.String]::Copy('%(CustomBuild.CMakeAdditionalInputs)').Trim(';').Replace(';', '&#xD;&#xA;'))&#xD;&#xA;</ReadTLog>
+      </CustomBuild>
+      <CustomBuild Condition="'%(CustomBuild.DepFileAdditionalInputs)' != ''">
+        <ReadTLog>%(ReadTLog)$([System.String]::Copy('%(CustomBuild.DepFileAdditionalInputs)').Trim(';').Replace(';', '&#xD;&#xA;'))&#xD;&#xA;</ReadTLog>
+      </CustomBuild>
+    </ItemGroup>
+    <!-- Compute the combined tracking log for all CustomBuild items together.  -->
+    <PropertyGroup>
+      <CustomBuildReadTLog>@(CustomBuild->'%(ReadTLog)','')</CustomBuildReadTLog>
+    </PropertyGroup>
+    <!-- Replace the combined tracking log on disk.  -->
+    <WriteLinesToFile File="$(TLogLocation)CustomBuild.read.1.tlog" Overwrite="true" Lines="$(CustomBuildReadTLog.ToUpper())" />
+  </Target>
+</Project>
-- 
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